(The subject was people who prefer to listen to the music of their youth 30 years ago rather than newer music)
With the exception of Sweet (which is a fairly new exception) I like new (new-to-me) music as much as the music of 25-30 years ago.
Even as far as Sweet are concerned a good deal of the thrill for me is discovering what they've been up to since I stopped paying attention in 1979, rediscovering how the old stuff sounds to me with decades' more "music appreciation experience," and noticing the influences and counter-influences between old and new musical styles.
For example I'm fascinated at how some of the Andy Scott's Sweet songs (I'm thinking especially of "Am I Ever Gonna See Your Face Again" and "Mind," to give two widely disparate examples) incorporate New Wave and other later-than-1970s musical styles without actually *being* "New Wave."
Also, the original band ranged through so many musical styles in a decade and pushed the envelope on most of them -- I guess we now know that the way it went down wasn't good for their careers, but I think it makes for an unusual depth in their music.
Which is why I wanted to cringe when, in an Andy Scott interview I came across recently, he said something along the lines that there were only so many notes in a musical scale and so one runs out of things to do after a while.
I don't make a living off my creativity so I don't have any right to criticize, but it made me sad. I wanted to send him a box of world music.